[Fwd: oops when I mount nfs with -o fsc]

fanchaoting <fanchaoting@xxxxxxxxxxxxxx> · Tue, 10 Apr 2012 16:08:14 +0800

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Subject: oops  when I mount  nfs with -o fsc
From: fanchaoting <fanchaoting@xxxxxxxxxxxxxx>
Date: Tue, 10 Apr 2012 16:06:22 +0800
User-agent: Thunderbird 2.0.0.9 (Windows/20071031)

Hi all : in nfs(2.6.38), i do as following. 
#cat /etc/exports
    /nfsroot      *(rw,no_root_squash,fsid=0,insecure)
#mount –t nfs4 –o fsc localhost:/   /nfsmnt
#sh create_file.sh

wait a while, i find oops.

PID: 4196   TASK: ffff88012365b580  CPU: 0   COMMAND: "sh"
 #0 [ffff880139435750] machine_kexec at ffffffff810310db
 #1 [ffff8801394357b0] crash_kexec at ffffffff810b63b2
 #2 [ffff880139435880] oops_end at ffffffff814dec50
 #3 [ffff8801394358b0] die at ffffffff8100f2fb
 #4 [ffff8801394358e0] do_trap at ffffffff814de544
 #5 [ffff880139435940] do_invalid_op at ffffffff8100ceb5
 #6 [ffff8801394359e0] invalid_op at ffffffff8100bf5b
    [exception RIP: __nfs_fscache_invalidate_page+121]
 #7 [ffff880139435ab0] nfs_invalidate_page at ffffffffa06fff6e [nfs]
 #8 [ffff880139435ad0] do_invalidatepage at ffffffff811243d5
 #9 [ffff880139435ae0] truncate_inode_page at ffffffff811245f2
#10 [ffff880139435b00] truncate_inode_pages_range at ffffffff811248f0
#11 [ffff880139435bf0] truncate_inode_pages at ffffffff81124c05
#12 [ffff880139435c00] truncate_pagecache at ffffffff81124c57
#13 [ffff880139435c30] nfs_setattr_update_inode at ffffffffa07033ab [nfs]
#14 [ffff880139435c70] nfs4_proc_setattr at ffffffffa071bb45 [nfs]
#15 [ffff880139435cb0] nfs_setattr at ffffffffa07043e0 [nfs]
#16 [ffff880139435cf0] notify_change at ffffffff8118e0c8
#17 [ffff880139435d60] do_truncate at ffffffff81170a84
#18 [ffff880139435dd0] do_filp_open at ffffffff81182ba9
#19 [ffff880139435f20] do_sys_open at ffffffff8116f849
#20 [ffff880139435f70] sys_open at ffffffff8116f960
#21 [ffff880139435f80] tracesys at ffffffff8100b387 (via system_call)

#!/bin/bash
i=0
BEGIN_TIME=$(date +%s)
TIME_OUT=14400 #Set the testTime.
SERVER_FILE="/nfsroot/file"
CLIENT_FILE="/nfsmnt/file"
while :
do
    dd if=/dev/zero of="$SERVER_FILE$i" bs=1b count=1 &>/dev/null
    cat "$CLIENT_FILE$i" &>/dev/null
    echo "good" > "$CLIENT_FILE$i"
    rm -fr "$CLIENT_FILE$i"
    now=$(date +%s)
    if (($now - $BEGIN_TIME > $TIME_OUT))
    then
        break
    fi
        let i=i+1
done

echo "This probleam may be fix.\n"

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